Hi, I need install point-to-point link on 2 buildings on 200 meters distance. I want to buy SXT because it is easy install. What model should to order: 1. SXTG 5HPacD 802.11ac, 16dBi, 28 degree antenna, 2. SXTG 5HPacD HG 802.11ac, 17dBi, 24 degree antenna, or 3. SXTG 5HPacD SA 802.11ac, 13 dBi, 90 d...